dma_device.cc (9294:8fb03b13de02) | dma_device.cc (9307:98e05d58f9eb) |
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1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software --- 35 unchanged lines hidden (view full) --- 44 45#include "base/chunk_generator.hh" 46#include "debug/DMA.hh" 47#include "debug/Drain.hh" 48#include "dev/dma_device.hh" 49#include "sim/system.hh" 50 51DmaPort::DmaPort(MemObject *dev, System *s) | 1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software --- 35 unchanged lines hidden (view full) --- 44 45#include "base/chunk_generator.hh" 46#include "debug/DMA.hh" 47#include "debug/Drain.hh" 48#include "dev/dma_device.hh" 49#include "sim/system.hh" 50 51DmaPort::DmaPort(MemObject *dev, System *s) |
52 : MasterPort(dev->name() + ".dma", dev), device(dev), sys(s), 53 masterId(s->getMasterId(dev->name())), | 52 : MasterPort(dev->name() + ".dma", dev), device(dev), sendEvent(this), 53 sys(s), masterId(s->getMasterId(dev->name())), |
54 pendingCount(0), drainEvent(NULL), 55 inRetry(false) 56{ } 57 58void 59DmaPort::handleResp(PacketPtr pkt, Tick delay) 60{ 61 // should always see a response with a sender state --- 85 unchanged lines hidden (view full) --- 147 DPRINTF(Drain, "DmaPort not drained\n"); 148 return 1; 149} 150 151void 152DmaPort::recvRetry() 153{ 154 assert(transmitList.size()); | 54 pendingCount(0), drainEvent(NULL), 55 inRetry(false) 56{ } 57 58void 59DmaPort::handleResp(PacketPtr pkt, Tick delay) 60{ 61 // should always see a response with a sender state --- 85 unchanged lines hidden (view full) --- 147 DPRINTF(Drain, "DmaPort not drained\n"); 148 return 1; 149} 150 151void 152DmaPort::recvRetry() 153{ 154 assert(transmitList.size()); |
155 bool result = true; 156 do { 157 PacketPtr pkt = transmitList.front(); 158 DPRINTF(DMA, "Retry on %s addr %#x\n", 159 pkt->cmdString(), pkt->getAddr()); 160 result = sendTimingReq(pkt); 161 if (result) { 162 DPRINTF(DMA, "-- Done\n"); 163 transmitList.pop_front(); 164 inRetry = false; 165 } else { 166 inRetry = true; 167 DPRINTF(DMA, "-- Failed, queued\n"); 168 } 169 } while (result && transmitList.size()); 170 171 DPRINTF(DMA, "TransmitList: %d, inRetry: %d\n", 172 transmitList.size(), inRetry); | 155 trySendTimingReq(); |
173} 174 175void 176DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 177 uint8_t *data, Tick delay, Request::Flags flag) 178{ 179 // one DMA request sender state for every action, that is then 180 // split into many requests and packets based on the block size, --- 12 unchanged lines hidden (view full) --- 193 pkt->dataStatic(data + gen.complete()); 194 195 pkt->senderState = reqState; 196 197 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 198 gen.size()); 199 queueDma(pkt); 200 } | 156} 157 158void 159DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 160 uint8_t *data, Tick delay, Request::Flags flag) 161{ 162 // one DMA request sender state for every action, that is then 163 // split into many requests and packets based on the block size, --- 12 unchanged lines hidden (view full) --- 176 pkt->dataStatic(data + gen.complete()); 177 178 pkt->senderState = reqState; 179 180 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 181 gen.size()); 182 queueDma(pkt); 183 } |
184 185 // in zero time also initiate the sending of the packets we have 186 // just created, for atomic this involves actually completing all 187 // the requests 188 sendDma(); |
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201} 202 203void 204DmaPort::queueDma(PacketPtr pkt) 205{ 206 transmitList.push_back(pkt); 207 208 // remember that we have another packet pending, this will only be 209 // decremented once a response comes back 210 pendingCount++; | 189} 190 191void 192DmaPort::queueDma(PacketPtr pkt) 193{ 194 transmitList.push_back(pkt); 195 196 // remember that we have another packet pending, this will only be 197 // decremented once a response comes back 198 pendingCount++; |
199} |
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211 | 200 |
212 sendDma(); | 201void 202DmaPort::trySendTimingReq() 203{ 204 // send the first packet on the transmit list and schedule the 205 // following send if it is successful 206 PacketPtr pkt = transmitList.front(); 207 208 DPRINTF(DMA, "Trying to send %s addr %#x\n", pkt->cmdString(), 209 pkt->getAddr()); 210 211 inRetry = !sendTimingReq(pkt); 212 if (!inRetry) { 213 transmitList.pop_front(); 214 DPRINTF(DMA, "-- Done\n"); 215 // if there is more to do, then do so 216 if (!transmitList.empty()) 217 // this should ultimately wait for as many cycles as the 218 // device needs to send the packet, but currently the port 219 // does not have any known width so simply wait a single 220 // cycle 221 device->schedule(sendEvent, device->clockEdge(Cycles(1))); 222 } else { 223 DPRINTF(DMA, "-- Failed, waiting for retry\n"); 224 } 225 226 DPRINTF(DMA, "TransmitList: %d, inRetry: %d\n", 227 transmitList.size(), inRetry); |
213} 214 215void 216DmaPort::sendDma() 217{ 218 // some kind of selcetion between access methods 219 // more work is going to have to be done to make 220 // switching actually work 221 assert(transmitList.size()); | 228} 229 230void 231DmaPort::sendDma() 232{ 233 // some kind of selcetion between access methods 234 // more work is going to have to be done to make 235 // switching actually work 236 assert(transmitList.size()); |
222 PacketPtr pkt = transmitList.front(); | |
223 224 Enums::MemoryMode state = sys->getMemoryMode(); 225 if (state == Enums::timing) { | 237 238 Enums::MemoryMode state = sys->getMemoryMode(); 239 if (state == Enums::timing) { |
226 if (inRetry) { 227 DPRINTF(DMA, "Can't send immediately, waiting for retry\n"); | 240 // if we are either waiting for a retry or are still waiting 241 // after sending the last packet, then do not proceed 242 if (inRetry || sendEvent.scheduled()) { 243 DPRINTF(DMA, "Can't send immediately, waiting to send\n"); |
228 return; 229 } 230 | 244 return; 245 } 246 |
231 DPRINTF(DMA, "Attempting to send %s addr %#x\n", 232 pkt->cmdString(), pkt->getAddr()); 233 234 bool result; 235 do { 236 result = sendTimingReq(pkt); 237 if (result) { 238 transmitList.pop_front(); 239 DPRINTF(DMA, "-- Done\n"); 240 } else { 241 inRetry = true; 242 DPRINTF(DMA, "-- Failed: queued\n"); 243 } 244 } while (result && transmitList.size()); | 247 trySendTimingReq(); |
245 } else if (state == Enums::atomic) { | 248 } else if (state == Enums::atomic) { |
246 transmitList.pop_front(); | 249 // send everything there is to send in zero time 250 while (!transmitList.empty()) { 251 PacketPtr pkt = transmitList.front(); 252 transmitList.pop_front(); |
247 | 253 |
248 DPRINTF(DMA, "Sending DMA for addr: %#x size: %d\n", 249 pkt->req->getPaddr(), pkt->req->getSize()); 250 Tick lat = sendAtomic(pkt); | 254 DPRINTF(DMA, "Sending DMA for addr: %#x size: %d\n", 255 pkt->req->getPaddr(), pkt->req->getSize()); 256 Tick lat = sendAtomic(pkt); |
251 | 257 |
252 handleResp(pkt, lat); | 258 handleResp(pkt, lat); 259 } |
253 } else 254 panic("Unknown memory mode."); 255} 256 257BaseMasterPort & 258DmaDevice::getMasterPort(const std::string &if_name, PortID idx) 259{ 260 if (if_name == "dma") { 261 return dmaPort; 262 } 263 return PioDevice::getMasterPort(if_name, idx); 264} | 260 } else 261 panic("Unknown memory mode."); 262} 263 264BaseMasterPort & 265DmaDevice::getMasterPort(const std::string &if_name, PortID idx) 266{ 267 if (if_name == "dma") { 268 return dmaPort; 269 } 270 return PioDevice::getMasterPort(if_name, idx); 271} |